Sorry but I am still a bit confused as to what exactly you are trying to do… But I will take another guess 
If you already have a local server, and are trying to connect to it from an RPi running Blynk client, then the command I think you are looking for will be like this:
var blynk = new Blynk.Blynk(AUTH, options = { connector : new Blynk.TcpClient( options = { addr:"xxx.xxx.xxx.xxx", port:8442 } ) });
That is how how I do it with my Local Server and RPi client:
If however, you are trying to do something totally different… then I think we will both have to wait for someone else to answer